Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '411d3ff00f672ea65f3a4c88ea4c3360717a63300caeec4d0773f5644c99e3e2' 
  AND token = 'ifw3EIJNjlBqeMepWd3/BSGshApbJCc7lKhABF6aPSA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}