Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f1cbdf23ea24e753ad5567d122a62222ba5ff7c4b40a23fd0bdcab861f3bce5' 
  AND token = 'PGPPD0dKQinH76x7YtWZxQjXV5uXjBY0Z13zcTmDUwM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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