Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63635e950ead3add750a178506fdd9cbdc3bae42b7c493d00b512301877e5f3e' 
  AND token = '6wTYi7RKbRm8g71G+Iiu5uy4pWpXXhisZTZErtGuDIA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00072

JSON explain

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