Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c63d628929aa74de17db8ac5e6385cee7e8bc4ce24635fa50760da504537736' 
  AND token = 'Iogelk+LPAraWHaKPt+sPkbamhhP2su2z+IE+jHOHnI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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