Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '552d261cb1757ee95a81ed2123cf8e782296e7c93674aedc30a80e0d1a1cd66e' 
  AND token = 'yLwoPFK78/+T4Fnl+5IyqMo+hGpBfDc+8zX5Opq+XG8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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