Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bfd477f7ffc5b375b6be4e91ae336cd33427a9982285b235af1412bf99f4dd42' 
  AND token = 'XdlYSRuhT+9KScE/mmKRO14RUIS98y1dUhDvYWmPl30=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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