Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9739d4a2527d49a6e60ffeced2e6a4cf1392b33fe3f336ea00f192db1fcc616c' 
  AND token = 'F2swhGJ+eeH1tNDwrit5/AG9gf79SrPaBS+TvBv3pBs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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