Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c37df93c61a46f31986f98a11089766ceeac9d3d11c16cc95a7e22c30107046c' 
  AND token = 'RvO0PzwzGdeyZnDJWnC6u+RR0i5zjW6kXJttEF062N8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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