Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de950da384fa9fc1c6975e6e36ddc2913af9e69f91dfb94ca8e0c668bb9c35e7' 
  AND token = 'sLPJt1WlGSTrH2Jc514TCYJUqrz25ZQv7eWyy2rYl3E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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