Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '647e08c78594851df55f1770f0ac3787ab54aa2172b82cb5794a57c45d0c5221' 
  AND token = 'k8+tXA+j6P6W4gVIF1IjNqMxgdyfrmwf9xXJJJKxxZA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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