Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99cad193953472220b7c9caa4b5b2857f5c99c75f9e64830122352a7f28a3b76' 
  AND token = '5z06qYI2J5OEp8kIWxUqQM0F2v5VEm40Pj35NifQyWI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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