Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '948f0d628e2a5c41100677faa78861c26ca314fe3490faa587608a4c66e42a30' 
  AND token = 'bNqxBcqX20xMPB9bJ/zYIh488XqlOJeTkBcyO4jgoDQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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