Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0fd4a7de487742f4f505f0ac55b6af1cf25ea423be58b112d14637965225540b' 
  AND token = 'fvn6sEkeHUFVG8PVWLxW0qLVHw5rE8g9hoUvi6djjMc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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