Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b3fe19f540789eec3c3707ed99d78bf69e671a44265e8bc53250ce4971ae509b' 
  AND token = 'GFr47v6HIFOQJYL7iStQTFQLVg8S4UiAr1OBU8yWbb0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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