Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5c5034cf1b8eaaba414b4e875cc93c446871833f5318fcc3bafab579287eb4dc' 
  AND token = 'rgZbx9lghRZ9RNyhex2Vq3KgKEY/D9aAoCUxAD73TNU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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