Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3450a6c93652b63e9b1c6226d12a6085ed7e837b1dc98b6fa4ba4af39d0d3b66' 
  AND token = '3tKGNjSeMRrkfuUQRFKZo8ERIibXYjPE12PjM6BG7vU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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