Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bbf683f1c0a40fddfabef94f2648f8c609618b669526c4e5afae216046ba2b5d' 
  AND token = 'c38mOgW1qdYwG9ZtKA8IB7rA7N0jWFyN48ScTG7rHFk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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