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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5cd24bd87d2cdd42285ae25224b3812269e9d8d2de18a63c6eb5f1a13382921a' 
  AND token = 'QXYi3q0knJ/SnzLrtZVpN8ilBfwp0Upe4Zkb2yZJhtw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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