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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2aab8d0f9d5c182798670840a0c06353675b0852b7f31ac7ea846f905fa8f1f' 
  AND token = 'qTyLOcZfQ/Zi+2q6KoSq5bOud8RLVKq0jmdepC1yO/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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