Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6911f32a31faa855b236ffc67ff2ee9190fcb8bb6a407c9198e81fdeb78faf92' 
  AND token = '5atqLZMpA/Ki6921g8/Djadp9QIHmsTL+Mvzk6Po3pI=' 
  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"
    }
  }
}