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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37171274695e3860a8f1f1a3d88e8e36bce702b252829f2831192ceae6219062' 
  AND token = 'esCh2GHH1C7rXV6OA/lzSuyQdFRTSP3VlLyeyWYWX2U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}