Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c095b5b8f142e7049dee8b44d952ff2d31729654a6d6ddb76f62f04ae534f54' 
  AND token = '+WJFMdeKoISzrE21FzkKR8SCNrSQZqKMOe/0wDCo0CM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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