Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41a044e48bebfeb0da4b0128e025a22397337459589eb29d99629792f21d7b21' 
  AND token = '5MJPt2fCSOWig5PSIcVrZJ7c8E7RbTuIuoSDg6mJAIs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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