Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cec64d360bb8fd9990c7315ad991434ca303c5258ce252914c8541f2f8bd9a1a' 
  AND token = 'jfHvZ1nA8RfG+w4FHnC0pWg2dRwOy8frGcwpcDYbURE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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