Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc0a5a60189e1136d180d72b3223dd22fdc8a479c599e54a54eacb89649f01f9' 
  AND token = 'TIbYN1mNcYygjsDbjJH5PEXcT3BQ3uB49qpj4Efkr6g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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