Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65ee53aead6b4223facc6dd3892e589d9b8eedee1fe12f87166a2dd09f7fc619' 
  AND token = 'lxYNhBNRp0Dqja4hAFAqrZqRAZ6fZ7TwDkIHbL9yP1k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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