Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbb501c52b0f5a7d11dcbfc8dcd097bec11592fbdc22e5e7af5951d2e8de54fe' 
  AND token = '9MX/RcswWFAFGD2zifYtnf4I9KPXcu1N7whQUs3AnbM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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