Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2745fd8fff52a5fc6033098bad1abc792fd05dd04a69909a1b411b65f741e075' 
  AND token = '2dH2TTCtJhJXCbI4czcFY3SleYDnjLn/5i2SM1XvLi0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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