Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a512f5daa781241beb09f324ef891f78b3698e7f91c52514fcf7da60de992295' 
  AND token = 'zesWZW+ApHAkAg5zeeJmF2JffN1yKU968LeZelQmMrA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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