Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7cd0666d77cbf42d8eb3ae17ac2b9f4a055bb955d184c71eb393699918c02863' 
  AND token = 'yK3yJo40hhacv2mlQ1lYMR/v1dPbo0ouha0gjkGkJKA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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