Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc6e6e3ff196a896caef34c253fb3fb175db435e18db73e9b4a7b4836563d635' 
  AND token = 'inbqBkTeoGAzY/vwR0Djm6lmYKpkbwfLrd9B1xR04LQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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