Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2fc31028e52fba2283528a160c36184343d8d7989aab40adf5422fee831b52d7' 
  AND token = 'o0V8RZSunZQikduKh+mhcUEaTmjUBupvI8kDqP915+E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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