Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db70a7a7609c1cdf22ba98345a00ccac024d7bfe02d467058ea7ebd4de33eccc' 
  AND token = '7ic3ntUF+q7qhiUM7fUmiANSj5xnt8Zabh3YRvx1d4Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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