Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa4dc6e440c2506b4f4630f10a5e89f5b4e8cee2b449a81f673a03a25dd84987' 
  AND token = 'rrQJ+b/0xcvy0prhf6Th1PXzVtak7GLXE6zDfj/IQAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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