Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c260b63ac8b1563ebe6382364a40247041371368bdc8591df55e9d6804db265' 
  AND token = '3fY+y9x/dOfHZFzKZ4zshU/j45dE3JS6MdJ6KxmYWXo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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