Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'def8d212d9843fe14e112336e951f031144fdf6c20695bb20e8c985092f3e26c' 
  AND token = 'zEAKVSpTbLtv27+WoKpgjIbDJcz1BdW/HtJXM2LtKvA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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