Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87811ea5e16e51628037d6ed00d53ed135361a2f3d8ba2d19eb90ba23b43c7c9' 
  AND token = 'BYDuKfi/SfMdGwokx/tcZV4Xtu77/WkP7NZ9ObrTvkM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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