Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '399e81a5c8f596b2ff329996f96e5f6cbea6e238f8e7421c1f7875b6031d5816' 
  AND token = 'NPuU8BU7PiwcqdqcDEukvXW/LbNBsOVaL7QElIzYa6g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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