Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c0a3ae8818e6456d92b69f4cfb03bae97c5020040388646f835650113b22d28' 
  AND token = 'poHKcxCsWklXCwBL/9GtPPdNmlNsJMBSwZrOLo0x9ko=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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