Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f24a23faba150144203870c06c6324464ea977785325ac614fc81e0d55078cbf' 
  AND token = 'runQFGR8aZAYTyXhgTDMMfd7y2x105qEWpQzU+jKQ9U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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