Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47618abfd13be1cfb94d22e7c4bab196ef1bf2384bec25dd3c6ff034a26228dd' 
  AND token = '7w2o4AlA0jHWsxKVbwvk3tpI7FEu1bN/CVgLu+DszM8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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