Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ae63a0450d82bb988b3a1a67e10b7bfa68e384f699099a1b1653c8b3cc239be' 
  AND token = 'QFFKJjmu+6rUuTXZxJa3IWNby2SGE7Vi0TdMBrx/bDs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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