SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01fa667e24cf1dc5d4cab17a700244b3db3d2cf33c99027031582676d671d40e' 
  AND token = 'Y0q9u4ZvwaN+IN7V36ZTNgiHGL7WZgCBj83mvqtROnU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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