Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6923bef16a06243571bd909314b2c8bd0237b8eadc9c9b6cc39a28a67b81dbff' 
  AND token = 'Fs1vxpUxWX0Ky990nVZ1sYxc3M4BVXU7tAoK+YGEqH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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