Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca5ba69da472f6271e7eb389df37187800bf25dd18be2ee6356a4276767e0502' 
  AND token = 'hUdGbb9hW3E1o6IvhzxOebna/ul31iidpZo7jR4hvYY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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