Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b0fe3d439451d90dc2596980c920cae7e4076db86e8722666980f945801e58c' 
  AND token = 'pzTRgGILRI3mOOjLYQ2D2oXWCpe9AB3dXAaVqntEeOU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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