Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89d26b38a27e2d992284d2fbfe1898acf06897c82d5ee0bcfb17f49a014a5b48' 
  AND token = '1YTiE12ohaIcc7YBBTekha1mhaoKNdt4cr2a5oTUibs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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