Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '086a2f4c0b429b6ea0b1a8a19a4615260a4ca1c6d950d80d3766df73e0afc013' 
  AND token = '3kfj3CTWcGbS3eZ1W0QgabbQJMAgff0tpGJ3epgYLpg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

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