Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4ecfd6681a01fa7db0b9b2b7667af6415ef386914c7e3a0cac8c4d7354a8d8d' 
  AND token = 'dtorZ+xzdHujbnl0UVIeCIKxV6GsuxzJTxrt+el/RpY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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