Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '76d2eb1774141fbc0ea1d8abfd394afeef4d45e31fa348896cb76451c9df4920' 
  AND token = 'Qjyf7oTby+5pOaXiRPWdHlrYzRoYiIVo1kzJouhM5TA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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