Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '178791efa324f0168ccfc0c4ea37921a987923f82b8ef0c801c0c534303220d6' 
  AND token = 'n17aomvx5NGvlVT0jUh97yiwsB339n2n+fO3OvC8z/4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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