Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9f1fafbe6102661c5404dd939407caffea9ddc6500502dac87e273344f63255' 
  AND token = 'nSbWqH4z6BzFrDw5H6CHybGCh0zXM52RCbM8M43Sar4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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