Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a44d23a3e497b4acd1fce8b58445a53099b123d70edb221a47997410fbb4c9a' 
  AND token = 'QJQ49X9RbEo36ZNAX53cwkvvX3TmPYYFrrXuWyoaWKQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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