Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9bb571a0e584c42dca837cbbae6e33de75f7f9bee9fc4797a56e179807e116e' 
  AND token = 'z+5hdph+SvkNeBo7E42ly4od1Su1VB2WURNPkkJLqVc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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