Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6790286a6d4ee6ab88d15f9b999592032b9e3f944c7580f4cff1314ad9256902' 
  AND token = 'N9bKMVdi8rG32DJzuxjAvwC3vAzEnWXzKmY3WeXcy6Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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