Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73a13b68704752089340101776a3dfc441380e3611c33e9fc0340af4b96da5d1' 
  AND token = 'o8x+00CewdRJcgtaAuoFXqmIQ5lRYPhHw6PJl2VsGiA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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