Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3836081e2fab9f717fcbe2e9ffc1ed677848b92aec5b3cd316909ca6c5522c81' 
  AND token = 'QEXrJ2//PCxd6dSkFm0ItIvbnnTDAWipvtVdecz9bOU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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