Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e24da2dfe66b2d9ee65b2ecdc131ec04996527804525ed6ac798b4cdeeff31b' 
  AND token = 'ptd3LfNgRsOvL7dTL6lzmcR3J/Q+D2P5FHCCNu86vRM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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