Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8b23a84d27ab81b0e6814200ec9d333b43a08026ecf080a4898e5d8a423b79c' 
  AND token = '09cVhPWgYeqCQXdSRJu32TZwu75W8DrS+2z3XFnvtjk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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