Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64e05f792bd2219d56c359837073f69b9c459e8419a05cec6b7994b33652680e' 
  AND token = 'L76Nb2l98a0fuzfSx0ZDlTjecOR4ZVG6QL2y+NnD518=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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