Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87a096033523095c108043b98491f2886b52ecd144a305d52893f88e861eab39' 
  AND token = 'EXN5eaaExEN4DJg3Y18agkPIZfdEmQbYxR72OsQspsw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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