Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '761c06d231cc26f73678201a166f9334d77511f6c9b9a850bd545078446266cb' 
  AND token = 'b2a0aRglPv815XccmN0SWfL9NksvPQ4CcbKl4utEK1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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