Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2322602bea1f0c7bc120197885651eeeeb86f80209d60386be3b40f5101c2347' 
  AND token = 'XekOelOhkNC18I06ISShSpSAroDWnHOxAbe3Slm8y3w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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