SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c5205c4262648f65b9d81c477882d7e926ae348a7b9fd99f3ec59de0da2cc87' 
  AND token = '50sD99/Jq7Bx0s91wPz+UjgKSmmET5IfnlNWQRhtJh0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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