Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4eb62a36f1cbbeecb317ba6f691d9bf015ba1d2ad05d0d52023364c213dbb972' 
  AND token = '7xU5BRikJ1gLG0u6aH/wXGoSLhHL0skDZecdR3B0ykc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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