SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1b36234e32197f9b4fbda44215ba792d3eb2a58f8b7fb88ab9a24a5a2c856ea' 
  AND token = 'MuT1hwcdh/wh96GvJIjEulopySKbQ3hjsTllYnIKXjs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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