Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff25868983192c813fd91be87f4609723defbc0b968bd9503027c4e2a2705637' 
  AND token = 'CXRaND9LJMeg0cidjPcrXSsGPQBYbjHTmfxJ1gQGkIk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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