Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22f6d1cf2e9cbaceb2bf8ac3dff32462315f1b58b1c5f21f1950fbc8496cacc0' 
  AND token = '9KWf/GtUCcyyjv+KEr6Gtv7RQhQsusw9Tq2xqArayiA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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