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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41a37e9553c4c97229ee0a9d90689b7b2ad56352d34420a9d9c36c63405bc93c' 
  AND token = 'Lv/MdaFuZOCwU44XPjiGMq4sI5HkX/150a7gRvHSBFM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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