Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddc097d6afb96cd84dacd934f269177a1575131c8fb511ad221a7b148516ac33' 
  AND token = 'd+XRXhAjXCUOAVh8kmiDrmf/Gk1mnxXDGu8agC+Um/g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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