Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e936dcc3b3cbe980ff9f6a410ba0a0727b7b297fc6993f02f509fe000a52da5a' 
  AND token = '9eXLotf4Vq02puwYzaGS9tjfiUFvpnE12OoyMrJ30A4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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