Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec44f52d0baefd6456a036a3dd2e617d177a84ae01082d1305815c89a76a312f' 
  AND token = 'bPwMk6oFc4rNS3CxL3MDiLlb598K8xAqwlWEFI4lj4U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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