Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8479785623bc0157185867913f5082b5e5fd7bba9958cd615ce2ad386c81bd92' 
  AND token = 'ID0M+CgIWGSDcXnzLVIkay9pZoz0y9CZX5ywjes1u30=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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