Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a42a68057ee1421f6cef88487c4d0e39faec9177b739c0c5836734e342fb3adc' 
  AND token = 'Xa5t9QIbmmZonn/nGYDDgt5mhbwJpUrf5IK0mcwz7DI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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