Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef7c851a4b49d72f0938c05f84cd18019fe170b6ea29ced576510df61dca77b2' 
  AND token = 'Fuibhtds7bC2dkzplH75+IhM2QDM3pUMKrBFoE7ZfPs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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