Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd89fec5fc0bba1076ffd25bc20c90296765310f2caf1efa390d65d502dafe7a6' 
  AND token = 'AEk7x5X1fVrSoLm/QRxZf5xTLS9fCE7Y/f/A8uX4ris=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}