Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc5c7f89d0085dbf30ba69ee5254ea788cf3442815b00c8c04cf9671b7ac5cd6' 
  AND token = 'oWVjSKBuO+6ee9TtuzHu/qb7yNwZtLdZ5cOrEAmoepg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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