Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'fab481c4e0c865fab98fb983c23669b8fe6a9fea0783f8a253adfafbb13d2364' 
  AND token = 'Mf/RbJhMkMEnbLGcJH7zHwHl8BN1WwTo2CG7P39MPBM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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