Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c2762115a01d59c62236f6012c0e8aed0d77f308a139943c6c600b9b57c42a7' 
  AND token = '1qlUiyQ7Nh2Ff5j1pw811M2+OgOYDMhxE+/97mRhQ88=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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