Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1fd93b7dba671c01511abd2feb533ffa3f02f41de63230be3bf8a3af89c957d' 
  AND token = 'A7JCQuFc0xIYUyOfUzsqesqhYQbIw3TJfNaoCcsGyZw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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