Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '519eeac76d423f6483b7e11e7abe37a05252cdd48668c2927dfea75180ade009' 
  AND token = '1i6dowBkMGNscuvJWN22H7FQfk9OIOI8fDpZm+636k4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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