Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ed09f04993bf50506fa2d29f8d54d469c4bb5cc559e8a02211c34bfd28bf6e6' 
  AND token = 'wsad1cp7IwXTfXezWvkcD0ZVVrXOjFbziNUYrFC1+uw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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