Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eebea352398975151308192541026b14ea1092df78ca2e7070b795f6f861e5d7' 
  AND token = 'gtkv2C5IbDwGCKBmQf4CacbjzIXfGLyK0UN8vGNXpiU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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