Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f0ebc56dbede1b348ee1b6961d368386346a8018d873f787917d9a7c0cd8340' 
  AND token = 'sYmnVzyOOBtU8N5NeXT3HJ9yGkOsZujo0pPUoJyI3AM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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