Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a879c2aeb831957e92587f3af8b5c74d51c9b038a2e590ca4a7873214ca0441e' 
  AND token = '/ZlkZwaTG54MVEXaAc7DBXgslissEIMuCzht8WIUr6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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