Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0bbb9ad3b654d9bfa570a0ae398f9286a56e2c923001f9f1cf8c2d6df4da7038' 
  AND token = '2s2IcANFqLW6kDb6wx3S3NNaS0IpnZMPNCtJcPpebMU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}