Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8cf5186afc46b295649bce9bc61280ef31a061121f99c5885dd8668fce6dcbf9' 
  AND token = 'cJh83drJmExY1wYIhQuTD8Uas1tCysZ4OJGS/AXbXXM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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