Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '566055768d7bdccc4e3dea5ae7dff62b740e40c67d400fa6a4ad3f01bce35def' 
  AND token = 'ggWyW+eRT7AYjUr4NWSe2uyG9qlQcexcLV5QHncE4IY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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