Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3121502e4c39de62117e8b911a36540ec85b5a5f95efeee47bf71c2ef75e729e' 
  AND token = 'dpkkeaS9V/Zri2QTxwXPfGgwo0K8CLBhcSkQdT6HvnM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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