Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '413a3ca3208a8dc94e070fda0b3d065f028b57711ff4561e64c1c8815dfb63ac' 
  AND token = 'R8p9U8SB8ImeZ5MIFOOrMXBluuBQIsfBWgPzcAjMna4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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