Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb1d75e8f7a15e873457f8b79b60ce53953003a38fb9e00dc6607d343e1bda4b' 
  AND token = '3KdCJW+KYkXo05rPjW8PceOekTofA6fJeW8n8hPihk0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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