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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a956a7cb7481e3c517c193b73c4221f27854a9522f94cfe2f024a171a351c29' 
  AND token = '5LtjCp/yHx+UXQzoqiGdA99bO+UJtscraSBU374RDBI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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