Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1e9a06ca332195569f7e496c82cc0b6bc8a2f1f63105d8f80b72d9ade690444' 
  AND token = '0R8Kk91G3uSlFs/7YlZuD1UTRw93wVkWFleJc2G2YNE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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