Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5fd5fb97fac5cfec31f31724caf09f2dba6810c0e5762218066a869e3655c5b1' 
  AND token = 'Kx3NSmyNdrLwVXVr+uHOcppckKdUwdyK1gWtDS79WBo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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