Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '793c2a98721e9c86345efbeb5369cef540d77ce0404cc94b9fa1892bb1adfae6' 
  AND token = 'gSXkwMoHRCh0eFFPr4P0cbVIm5epbKQidWZ/Ym/ksvA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00069

JSON explain

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