Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96899a545123e3484a521b5d62c3706cdc3be940cc152c6656fba5e9ca324e23' 
  AND token = 'pRBBMbqpvvWrkB+kDghuC7QR0hNSerPMEdJDiYXIt5Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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