Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9905efcfb527ad7fb8416e0b52a2cceb877f439698d3b2098c4d5651f7331ba1' 
  AND token = '3djNRUnFu53IhUBauQWSPJOc2TexDrPI87RM2FgVFrk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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