Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8649163048e059e548b4c157661a598cb088771a3428e5dec0e120d92fbd3c84' 
  AND token = 'HdDQ6Z3YxrFsVeEtUvfSEQdS6StdY05CSMzteYHm12E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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