Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c571dad423c93d2221e6918d723d953f18824f7f72563a6b68f7ab94e76111cd' 
  AND token = 'QNFln+d7P+Z/fHqDdmoXsokv0sLmIT1Z16i5pkkBUCc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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