Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be62878f9370985076b8ffdb14ff6351cba3e6fb275621ee21806b5eb03ecc71' 
  AND token = 'sLfnViB3aZ9lske9vkfZF3YJ3gURGeN2htmTxvkjjDA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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