Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '301c6c59a25898aee0644eea903dee9cd0dccb235b6971058b632d7cc3b8067e' 
  AND token = 'LGELeMRc0Uz1i0s19YqgnKWlSgZHO9JsRB2sDlaZkCA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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