SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11fc3aa67f821a79a689b25a32996aabc34445648b10dac5f2fd75c8a28b4627' 
  AND token = 'UW2vnbVLiFZjVnkat4EJpVq6+TKHK3Eh+C47CAOlWqU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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