Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1544193cec79b6fd286780afde675bf990433a760d0afaa6722ba4ac4ce4adad' 
  AND token = 'M/tjdj9DntU9mb2wM6x51c+bXhn6xXgogcx8wZYIpBw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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