Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd82fa260b237c2bc92a3abf3f2750bef56117b76fc7b05f46968b313939bbd12' 
  AND token = 'CN1fFWtV76e+pQUcFlggcPPc0sz6p3lk1Yw1/LGgJqs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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