Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5c2669b3db8aff0e8af18092bb72dc21c349f6593e32a12a95b3406e979c3be' 
  AND token = 'VRmO0VH+h1ed7fjIUhNm3vtLgEch2vHY9STIN5odup0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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