Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3856ae0e7349be3905071d67498689950387df26fdd4747f21c5cc61aa89fb9' 
  AND token = 'QlcxM5Bs6wgUMiipdyxpst9iZ7wr2DNZee4M5ztCHwk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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