Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e6f0935f8dd90a5b511907be783ba8536ca212000fa3f49d9ac5543cddce6bb' 
  AND token = 'NshrJxFfBlmXVsYUYbTtaAoBN+i132zwU5oiDh9uKaE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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