Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00f6b5354bc418a45dda9b1fb85cb2e99d3783ace0e6e949806d9d544f79c886' 
  AND token = 'RaDujMqlyQyBzLlfIl2Ev8+/tC4n08DssLM+IVJFnDs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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