Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45d897e9703637076504160c5e90c879f7ddcd72278b26d09aa408f1650f4de6' 
  AND token = '2tO5kkFcfqrq8bAdpyQZIeu8Nsptb4BMXRSlAnK7Rqs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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