Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '094b71ed034edaad3ff6fef427b0a3615b2de386e0adf65bb524ae078739bfc6' 
  AND token = 'QmdBMvaKStO3hRb0BvjOt3OgLNmWIPRy5JYkD7m/4lk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}