Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fdd83d41d949b136cf9a48886decef6c3f4b260116a2dc3663a8d097af707e29' 
  AND token = 'X4jC16tzhKgam/YTlucsct5uxEsT6yXLeH2m8fmhwBM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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