Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5120769a12a7567a10d032bda53b90d6de3468d972440cb33df44dba4832bdcb' 
  AND token = 'MA9mSR6o7lXiMNThqiTBkmQJWs8rUbXJYJA1g2x6AlQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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