Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5546dfb83bbd907f2622ae0164bd291c7f7f1d98a0d5c5c20d75eb0d15e3227' 
  AND token = 'fNJIk9ifl1BmRhL2KpsA4ZKXtEcVuaH2ukY3HhZVBZg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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