Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4fc002d46b5eca462255087f884e233c7fd87767e26378832fd7c9a961850d6c' 
  AND token = 'UXucxnLa6ZQuTZknya/xmOZB9piuxirSyWTXFkq6sVI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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