Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a21053e6404d97c6f569511c5dd37ffcd11b09d27af990148bf00e3cd64440d7' 
  AND token = 'EGiyDKK+x1IqbVBiuKvNKpAy7OA9/rq0+VnA8O32y3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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