Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6569f10557b18077efeceff1c9e2b32a16d9f241241c6ac5f1f65aff39021a0e' 
  AND token = 'GQMwue2ZnR9VxGQFhitFC1I6JqL3Xg5trAUgR8HHYVY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}