Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a89a01e7c22159af2c2c2f9bb33b3ac2c8dea69388232a507ae16e062297c589' 
  AND token = 'Z5U979cXtIgtfSvMs2che+ZJsqOf93nAnn2u5lbFvtI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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