Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee01d23f9a50819c550708727aa8211a94e2efd8ba6d5fd7e3bf063c656dccf7' 
  AND token = '5rYByZps3araNjA+9IQY7n9Uoht4iOYCY8SEBOwWcV4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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