Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d54e934ee7db2b239883bd0e9e2088e84f59674f432a97a924bee35dab42deb' 
  AND token = 'Eo7dQUUZcgdORwm9DRYwWVxttX9KunEQXoLpLGTL3s8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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