Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '516118129c93cbf0a1d30fec205ef23c7a0cd078b476d14a1b2a79dfb5f893e1' 
  AND token = 'JxyG9dBqpKFhIzC4rg6ELxx4l6E6nBnwJHcCGpLaR9A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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