Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b90226d365ae80940af6724673fefa2593ac65247bfdf3af15b2212c4b6a9672' 
  AND token = 'FNUh5I2uj+AoqJYKsXG89YdKj3cko5l7Tol8WMjDM1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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