Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a7348b9fcaa3a67baee3e81e838126a1636ed37024485a51118ed11807df540' 
  AND token = 'nVPTBylshlYZL0lC+0NH8qqrzBUEgRowozOHE0IAE6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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