Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '083ac71974226628d5a10d8f4aab1650d6a65733d3cc2f6849e69e93597e8abc' 
  AND token = 'kUyD7oJiAXxgrx6wjpIV3sqBNoQ9iCTTcsJd4bWTHNA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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