Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c0399ff7cd0fdcb7e443eb39b1af0a891c3ce866e49d8190d79c9e80585f0ad' 
  AND token = 'U5spLvwuCRwEav37/4Jz5RN4K++mF541OhrT+db+mTg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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