Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7aa5c0e55b4ed7d4a0e44e98c4a391c8a57e993ab147f0a271dc6b4201b7ea36' 
  AND token = 'Lv/FJkQzh6P8dp6Z1dUk6ITxIFoyMBAyLBMC643HSow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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