Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c71ab36ffeb1f81279bcee45ab9f40463eb8aa016d4cc9788826cc3aa3ff9124' 
  AND token = 'q00+Ah5d80f4FuC7GRiVyiajRfzmwqoOzxIZeZB3uRc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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