Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '560df2002b0f70f31a720bda4adbab5982ae1f63147c6fd81a0af523bfbb3468' 
  AND token = 'kp8VQKO+BtJallxlLhFaiJO7WtF27sz5KgfznsktUSw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

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