Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6b22b204a42d5b8c591fe007e18df007cd02d7b67c13f097ba65520ee2eb61f' 
  AND token = 'ZxBFzOiHcYS62aWQ1lj6ypyOkdz1BbyqQiBER4hWVbc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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