Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f93abcc8f3da46f7a65518911c892e3d772b09bdc90ed9032a0d79dc1f795cee' 
  AND token = 'qnDqGw/8d9PgmbXYJ9hoZNXnyeYoxsLLacvf/NF88xE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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