Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7e1f7632f48bebd3d48408af2388e3bf80afc13aba62b440936cb5dbc753220' 
  AND token = 'WGQpECRVgyjXGjZnBYL0e0neeMOGEhxJEYjTMXj5+rA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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