Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe338497f6bb2d8051b06bd469403b233dfa64c399936a01d40e67167dbe9a9c' 
  AND token = 'pjAkwI3m1j1aBR42L/ElBWTWos4Uc8wqkkN0jiH8ww0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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