Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1fa391d4d58e898a544fcb17460234ba322f6024b293c1f8d45bf36d407e3b2' 
  AND token = 'jUnWv5fB246Fz1uN6/1t/xf+jqemhK1NydBW6oYBNic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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