Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7516877ff1716523c7a76b41cac27e3694773653c171d62c2748a146b1d3bc9d' 
  AND token = 'npBuQUPlpb8b5vAptMwvnHNIzXmqX2MdKBC7jt0PRkY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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