Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ccc0914ab99b148a0a232076f632a6fa445f32129bdd78e350aa0b9f46d9062' 
  AND token = 'jKpW/nPMFrrzKJTZzjCQabxFaMWfjUMRoMB2TwwaFCs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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