Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c5f7d2f17258becc45248c76bd0f819a59f64150bf4370a627e5cf4d1438ebc' 
  AND token = '2vyzDCnow0/o4IHH/t6h0IvGvFEge2mN+kOIynk0FNI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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