Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '290fdd2d6db558f3021bc97f04c6ac638e73cd646b59256d430ebfb6ff2488a1' 
  AND token = 'IexZeq0O8yNL+FcSPiBHUNG5fcofrvrD6OSSPssJvDc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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