Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2ddcac7d02e0179da12b52287af584e18f48e7b1f93d72d16df2a211e9b24c7' 
  AND token = 'et70250z3ZMyGcZGPFfz9zHj6TF5rRTHeA4i9hjEpBE=' 
  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"
    }
  }
}