Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '621db277989da105a5ba95ad66128b3eb69fe55039658be2cb96beea7450b9ef' 
  AND token = 'm/QaTuzOJ5VUwOEcPEZ0JJqfZTTBchQ1EYeXYQBICfc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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