Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7f137d9303f30fa21c9126bb2bfa2cfa8d8a14cef971303ae321889590ce186' 
  AND token = '0Pn2EU76hRpUypRTSy6Rd/iDlwE/H3uQD36viTpBwTU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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